Technical Witts, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01F MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 183
 
  
 
H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF 1101

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6114939 Planar stacked layer inductors and transformersJun 07, 99Sep 05, 00[H01F]
5402329 Zero voltage switching pulse width modulated power convertersDec 09, 92Mar 28, 95[H02M]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2006/0062,026 High efficiency power conversion circuitsAbandonedSep 18, 04Mar 23, 06[H02M]
2005/0285,661 Gate drive circuits for high efficiency power convertersAbandonedJun 28, 04Dec 29, 05[H01L]
6856522 Synchronous rectifier gate drive circuits for zero voltage switching power convertersExpiredSep 13, 03Feb 15, 05[H02M]
6822427 Circuits and circuit elements for high efficiency power conversionExpiredMay 01, 02Nov 23, 04[G05F]
6650550 Synchronous rectifier self gate drive for zero voltage switching power conversion circuitsExpiredMay 28, 02Nov 18, 03[H02M]
6580255 Adaptive gate drivers for zero voltage switching power conversion circuitsExpiredMay 28, 02Jun 17, 03[G05F]
6507176 Synthesis methods for enhancing electromagnetic compatibility and AC performance of power conversion circuitsExpiredSep 04, 01Jan 14, 03[G05F]
6483369 Composite mosfet cascode switches for power convertersExpiredOct 02, 01Nov 19, 02[H03K]
6462963 Zero voltage switching power conversion circuitsExpiredFeb 12, 02Oct 08, 02[H02M]
6452814 Zero voltage switching cells for power convertersExpiredSep 19, 01Sep 17, 02[H02M]
6437999 Power electronic circuits with ripple current cancellationExpiredMay 12, 01Aug 20, 02[H02M]
6411153 Universal pulse width modulated zero voltage transition switching cellExpiredJan 29, 01Jun 25, 02[H03K]
6304065 Power electronic circuits with all terminal currents non-pulsatingExpiredMar 02, 01Oct 16, 01[G05F]
6272023 High efficiency coupled inductor soft switching power convertersExpiredMay 23, 00Aug 07, 01[H02M]
6252383 Buck and boost power converters with non-pulsating input and output terminal currentsExpiredJul 11, 00Jun 26, 01[G05F]
6198260 Zero voltage switching active reset power convertersExpiredJun 05, 00Mar 06, 01[G05F]
6195270 Self clamping zero voltage switching DC transformersExpiredJun 19, 00Feb 27, 01[H02M]
6147886 Dual opposed interleaved coupled inductor soft switching convertersExpiredMay 15, 99Nov 14, 00[H02M]
6101108 Regulated input current, regulated output voltage power converterExpiredAug 13, 99Aug 08, 00[H02M]

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